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New page: '''Unreleased structure''' The entry 6oy9 is ON HOLD Authors: Description: Category: Unreleased Structures
 
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'''Unreleased structure'''


The entry 6oy9 is ON HOLD
==Structure of the Rhodopsin-Transducin Complex==
<SX load='6oy9' size='340' side='right' viewer='molstar' caption='[[6oy9]], [[Resolution|resolution]] 3.90&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[6oy9]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Bovin Bovin] and [http://en.wikipedia.org/wiki/Bos_taurus Bos taurus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=6OY9 OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=6OY9 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=RET:RETINAL'>RET</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=6oy9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=6oy9 OCA], [http://pdbe.org/6oy9 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=6oy9 RCSB], [http://www.ebi.ac.uk/pdbsum/6oy9 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=6oy9 ProSAT]</span></td></tr>
</table>
== Function ==
[[http://www.uniprot.org/uniprot/OPSD_BOVIN OPSD_BOVIN]] Photoreceptor required for image-forming vision at low light intensity. Required for photoreceptor cell viability after birth. Light-induced isomerization of 11-cis to all-trans retinal triggers a conformational change leading to G-protein activation and release of all-trans retinal (By similarity).<ref>PMID:16908857</ref> <ref>PMID:17060607</ref>  [[http://www.uniprot.org/uniprot/GNAT1_BOVIN GNAT1_BOVIN]] Guanine nucleotide-binding proteins (G proteins) are involved as modulators or transducers in various transmembrane signaling systems. Transducin is an amplifier and one of the transducers of a visual impulse that performs the coupling between rhodopsin and cGMP-phosphodiesterase. [[http://www.uniprot.org/uniprot/GBB1_BOVIN GBB1_BOVIN]] Guanine nucleotide-binding proteins (G proteins) are involved as a modulator or transducer in various transmembrane signaling systems. The beta and gamma chains are required for the GTPase activity, for replacement of GDP by GTP, and for G protein-effector interaction.
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Rhodopsin (Rho), a prototypical G-protein-coupled receptor (GPCR) in vertebrate vision, activates the G-protein transducin (GT) by catalyzing GDP-GTP exchange on its alpha subunit (GalphaT). To elucidate the determinants of GT coupling and activation, we obtained cryo-EM structures of a fully functional, light-activated Rho-GT complex in the presence and absence of a G-protein-stabilizing nanobody. The structures illustrate how GT overcomes its low basal activity by engaging activated Rho in a conformation distinct from other GPCR-G-protein complexes. Moreover, the nanobody-free structures reveal native conformations of G-protein components and capture three distinct conformers showing the GalphaT helical domain (alphaHD) contacting the Gbetagamma subunits. These findings uncover the molecular underpinnings of G-protein activation by visual rhodopsin and shed new light on the role played by Gbetagamma during receptor-catalyzed nucleotide exchange.


Authors:  
Structures of the Rhodopsin-Transducin Complex: Insights into G-Protein Activation.,Gao Y, Hu H, Ramachandran S, Erickson JW, Cerione RA, Skiniotis G Mol Cell. 2019 Jun 24. pii: S1097-2765(19)30440-X. doi:, 10.1016/j.molcel.2019.06.007. PMID:31300275<ref>PMID:31300275</ref>


Description:  
From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
[[Category: Unreleased Structures]]
</div>
<div class="pdbe-citations 6oy9" style="background-color:#fffaf0;"></div>
 
==See Also==
*[[Rhodopsin 3D structures|Rhodopsin 3D structures]]
*[[Transducin 3D structures|Transducin 3D structures]]
== References ==
<references/>
__TOC__
</SX>
[[Category: Bos taurus]]
[[Category: Bovin]]
[[Category: Large Structures]]
[[Category: Cerione, R A]]
[[Category: Erickson, J W]]
[[Category: Gao, Y]]
[[Category: Hu, H]]
[[Category: Ramachandran, S]]
[[Category: Skiniotis, G]]
[[Category: Complex]]
[[Category: G protein]]
[[Category: Gpcr]]
[[Category: Signaling protein]]
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